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#ifndef __FS_H__
#define __FS_H__
#include <xen/io/fsif.h>
#include <mini-os/semaphore.h>
#include <mini-os/types.h>
#define FSIF_RING_SIZE_ORDER 1
#define FSIF_RING_SIZE_PAGES (1<<FSIF_RING_SIZE_ORDER)
struct fs_import
{
domid_t dom_id; /* dom id of the exporting domain */
u16 export_id; /* export id (exporting dom specific) */
u16 import_id; /* import id (specific to this domain) */
struct minios_list_head list; /* list of all imports */
unsigned int nr_entries; /* Number of entries in rings & request
array */
struct fsif_front_ring ring; /* frontend ring (contains shared ring) */
u32 gnt_refs[FSIF_RING_SIZE_PAGES]; /* grant references to the shared ring */
evtchn_port_t local_port; /* local event channel port */
char *backend; /* XenBus location of the backend */
struct fs_request *requests; /* Table of requests */
unsigned short *freelist; /* List of free request ids */
struct semaphore reqs_sem; /* Accounts requests resource */
};
extern struct fs_import *fs_import;
void init_fs_frontend(void);
int fs_open(struct fs_import *import, char *file);
int fs_close(struct fs_import *import, int fd);
ssize_t fs_read(struct fs_import *import, int fd, void *buf,
ssize_t len, ssize_t offset);
ssize_t fs_write(struct fs_import *import, int fd, void *buf,
ssize_t len, ssize_t offset);
int fs_stat(struct fs_import *import,
int fd,
struct fsif_stat_response *stat);
int fs_truncate(struct fs_import *import,
int fd,
int64_t length);
int fs_remove(struct fs_import *import, char *file);
int fs_rename(struct fs_import *import,
char *old_file_name,
char *new_file_name);
int fs_create(struct fs_import *import, char *name,
int8_t directory, int32_t mode);
char** fs_list(struct fs_import *import, char *name,
int32_t offset, int32_t *nr_files, int *has_more);
int fs_chmod(struct fs_import *import, int fd, int32_t mode);
int64_t fs_space(struct fs_import *import, char *location);
int fs_sync(struct fs_import *import, int fd);
#endif
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